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contast TWB. DeTeWe The ''fast one'' of the con-family. contast-push·button dialling (IWV and MFC) Shipton Communications Limited Shipton House Frogmore Road Herne! Hempstead Hertfordshire HP3 9TG Tel: (0442) 47171 Telex: 825492 contast TWB. DeTeWe General specifications: Dimensions/weight - packed Height: 100 mm Width: 305mm Depth: 230 mm Weight: approx. 2 kg The contast TWB operates fast A fast and reliable push button operation reduces lengthy dialling and the number of misrouted connec • tions. You can save time with each telephone call you make. When dialling a six-digit telephone number with a conventional rotary dial, you will require about 8 to 10 sec. Advanced technology, contast TWB with additional But with push-button dialling attractive design loudspeaker unit. For a high you will only need 4 to 6 sec. The contast TWB is degree of convenience. , 1 3 Less misrouted connec housed in an attractive flat An additional loudspeaker 4 ! 6 tions, for the contast TWB casing. (H xWxD/85x 225x unit can be connected to the 7 a • 181 mm) and the handset is contast TWB to make o * 0 u I .! light and easy to be held in telephoning even more \...__ _________ the hand. convenient. You actuate a TWB The contast with its push-button and persons Width: 225mm sophisticated solid-state present can listen to your technology facilitates telephone conversation. servicing and operates with contast TWB/R (IWV) with prevents the most frequent DeTeWe reliability. re-dial facility of the last / mistakes resulting from rotat By the way, the contast telephone number. ( . __ ing the disc too fast, failing to TWB is available in green - - -·�;;;;;;;;=======;;;�'"' reach the stop or having the and orange. set in an improper position. Height: 85 mm The push-buttons are always clearly in view, even when you are standing behind the set. The desired push-button is only touched. All is done in one phase of motion instead of three as it used to be with the rotary dial. Depth: 181 mm "' The ingenious supplement x "' for your system 0 'r The contast TWB (IVVV) can ;;: M "' easily be connected to the M various sizes of PABXs operating with rotary dial Technical data telephones. �I TWB Q; The contast (MFC) D E can only be connected to MFC - multi-frequency code Common data " c: PABXs with tone dialling dialling Impedance (300-3400 Hz): " DeTeWe "E' facility. Frequencies according to 450 ± 100 Ohms 0 .; Q 23 of the CCITI Loop current: min.17 mA c: 0 Frequency deviation: ± 1.8% Weight, set: 1 kg Deutsche Telephonwerke � u ;;: Transmission level: Weight, handset: 220 g und Kabelindustrie AG ii ± 0 - 4dBm 2.5dB Connecting cord, length: 2 m Export Department E a; Casing - ABS: WrangelstraBe 100 u ·;: IWV - impulse dialling impact-resistant/anti-static D-1000 Berlin 36 .c: u Impulse/pause: West-Germany � ± .8 1:1.6 (10 0.5 pps) Telephone (030) 61 04-1 0 " Inter-digital time: Telex 0183605 B " 800 msec. + 150 msec. Cable Address detewe berlin en .

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Historical Perspectives of Development of Antique Analog Telephone Systems Vinayak L
Review Historical Perspectives of Development of Antique Analog Telephone Systems Vinayak L. Patil Trinity College of Engineering and Research, University of Pune, Pune, India Abstract—Long distance voice communication has been al- ways of great interest to human beings. His untiring efforts and intuition from many years together was responsible for making it to happen to a such advanced stage today. This pa- per describes the development time line of antique telephone systems, which starts from the year 1854 and begins with the very early effort of Antonio Meucci and Alexander Graham magnet core Bell and ends up to the telephone systems just before digiti- Wire 1Coil with permanent Wire 2 zation of entire telecommunication systems. The progress of development of entire antique telephone systems is highlighted in this paper. The coverage is limited to only analog voice communication in a narrow band related to human voice. Diaphragm Keywords—antique telephones, common battery systems, cross- bar switches, PSTN, voice band communication, voice commu- nication, strowger switches. Fig. 1. The details of Meucci’s telephone. 1. Initial Claims and Inventions Since centuries, telecommunications have been of great cally. Due to this idea, many of the scientific community interest to the human beings. One of the dignified per- consider him as one of the inventors of telephone [10]. sonality in the field of telecommunication was Antonio Boursuel used term “make and break” telephone in his Meucci [1]–[7] (born in 1808) who worked relentlessly for work. In 1850, Philip Reis [11]–[13] began work on tele- communication to distant person throughout his life and in- phone.
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TELEPHONE COLLECTORS INTERNATIONAL Telephone Collectors International is an organization of telephone collectors, hobbyists and historians who are helping to preserve the history of the telecommunications industry through the collection of telephones and telephone related material. Our collections represent all aspects of the industry; from the very first wooden prototypes that started the industry to the technological marvels that made the automatic telephone exchange possible. If any of this interests you, we invite you to join our organization. Look around and see what we have to offer. Thanks for stopping by! Telephone Collectors International website including become a member: http://www.telephonecollectors.org/ Questions or comments about TCI? Send e-mail to [email protected] ********************************************************************************* Books Recommended by the editors: Available now ... Old-Time Telephones! Design, History, and Restoration by Ralph O. Meyer ... 264pp Soft Cover 2nd Edition, Expanded and Revised ... A Schiffer Book with Price Guide for Collectors Available at Phoneco.com or Schiffer Publishing, Ltd., 4880 Lower Valley Rd, Atglen, PA 19310 e-mail: [email protected] ********************************************************************************** Coming Soon: TELEPHONE Dials and Pushbuttons Their History, Development and Usage by Stanley Swihart ... 2 volumes, 300 pp ea. Box 2818, Dublin, CA., 94568-0818. Phone 1 (925)-829-2728, e-mail [email protected] *********************************************************************************
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Historical Timeline of Canadian Telecommunications Achievements
Historical Timeline of Canadian Telecommunications Achievements July 26, 1874 Alexander Graham Bell discloses idea for a telephone to his father in Brantford, Ontario. 1880 Bell Canada is incorporated. February 1, 1881 Bell Canada installs its first public telephone in Lancefield’s Stationery Store, in Hamilton, Ontario. The telephone is not equipped with a coin collector and customers pay the storekeeper. June 11, 1881 Bell Canada successfully places the world's first international submarine telephone cable between Windsor, Ontario and Detroit, Michigan (US). 1885 Alberta's first telephone call, between Fort Edmonton and the St. Albert mission. August 10, 1876 Alexander Graham Bell's Double Pole Membrane Transmitter and Iron Box Receiver are used to transmit and receive the world's first one-way long distance telephone call from Brantford to Paris, Ontario. 1887 The first long distance call, between Edmonton and Battleford, Saskatchewan. December 7, 1895 The Northern Electric & Manufacturing Co., now Nortel Networks, is organized, as a spin-off of the Bell Mechanical Department. April 13, 1900 A common battery service is introduced in Bell Canada’s territory in Ottawa, Ontario. Instead of turning a crank on the telephone to signal the operator, the customer merely picks up the receiver. The batteries are removed from the customers’ premises to the central office. They are still there today, maintaining telephone service even during a power failure. 1903 Bell Canada becomes subject to the Railway Act of 1903 and changes to rates for telephone service must now be approved by the Board of Railway Commissioners for Canada. 1904 The City of Edmonton purchased the Edmonton District Telephone Company.
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Historical Perspectives of Development of Antique Analog Telephone Systems Vinayak L
Review Historical Perspectives of Development of Antique Analog Telephone Systems Vinayak L. Patil Trinity College of Engineering and Research, University of Pune, Pune, India Abstract—Long distance voice communication has been al- ways of great interest to human beings. His untiring efforts and intuition from many years together was responsible for making it to happen to a such advanced stage today. This pa- per describes the development time line of antique telephone systems, which starts from the year 1854 and begins with the very early effort of Antonio Meucci and Alexander Graham magnet core Bell and ends up to the telephone systems just before digiti- Wire 1Coil with permanent Wire 2 zation of entire telecommunication systems. The progress of development of entire antique telephone systems is highlighted in this paper. The coverage is limited to only analog voice communication in a narrow band related to human voice. Diaphragm Keywords—antique telephones, common battery systems, cross- bar switches, PSTN, voice band communication, voice commu- nication, strowger switches. Fig. 1. The details of Meucci’s telephone. 1. Initial Claims and Inventions Since centuries, telecommunications have been of great cally. Due to this idea, many of the scientific community interest to the human beings. One of the dignified per- consider him as one of the inventors of telephone [10]. sonality in the field of telecommunication was Antonio Boursuel used term “make and break” telephone in his Meucci [1]–[7] (born in 1808) who worked relentlessly for work. In 1850, Philip Reis [11]–[13] began work on tele- communication to distant person throughout his life and in- phone.
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Addendum- Duchamp's and Stieglitz's Urinal, Eugenics, Ocular Syphilis
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Jonathan Anguleov
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Appendix 9 Glossary Access Line (Wats)
APPENDIX 9 GLOSSARY ACCESS LINE (WATS) - A telephone line connected to the customer's premises to either establish or receive calls to or from a particular WATS Service Area. AMA (AUTOMATIC MESSAGE ACCOUNTING) - GSA furnished reports providing a tabulation of FTS calls, indicating the date, area code, telephone number called, time of day, and duration. ANALOG - As opposed to digital. Signals which make use of electrical analogies (e.g., varying voltages, frequencies) to produce a signal of a continuous nature rather than a pulse nature. ANSWERBACK (DATA) - A signal or tone sent by the receiving business machine or data set to the sending station for identification or to indicate it is ready to receive transmission. AREA CODE - The three-digit code used when dialing long distance calls from one Number-Plan Area (NPA) to another. ASCII - American Standard Code for Information Interchange. This is the code established as an American standard by the American Standard Association. ASR - Automatic Send and Receive. BROADCAST - The dissemination of information to a number of stations simultaneously. BUSY HOUR - The peak 60-minute period during a business day when the largest volume of communications traffic is handled. CARD DIALER - Automatic dialer and regular telephone combined in one desk-top unit. Phone numbers coded on plastic cards are inserted in the dialer slot for fast, accurate dialing or touch-tone entry of fixed data into a data processing system. CATHODE RAY TUBE (CRT) - A television-like picture tube used in visual display terminals. CCSA - Common Control Switching Arrangements; designed for customers having extensive private line communications requirements.
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